Is it running okay? See if you can access the Twonky config page on http://your.nas.ip.address:9000 as that would prove whether it has started up okay. Assuming it is, then try downloading a UPnP control point and see if you can see it with that. Even if you don't have a Linn DS media player, you could try Linn's Kinsky Desktop (for PC) or their Kinsky app (iPhone/iPad) to see if that shows the Twonky server (it's free and thus even if you don't have a Linn DS, it would be ideal to test whether Twonky is advertising itself and this the control point can show it as available; see here)